REPL snippet

Program.cs

using System;
using Microsoft.ClearScript.V8;

namespace v8repl
{
    class Program
    {
        static void Main(string[] args)
        {
            /* create instance of V8 */
            V8ScriptEngine v8 = new V8ScriptEngine();
            /* assign System.Console to Javascript variable myConsole */
            v8.AddHostType("myConsole", typeof(Console));

            /* */
            bool kill = false; 

            /* keep doing the following while kill = false */
            while(!kill)
            {
                /* get input string from process stdin */
                string input = Console.ReadLine();

                /* using a string literal for simplicity sake */
                if(input == "exit")
                {
                    Environment.Exit(0); /* exit code 0 means no error */
                }

                /* safely evaluate input in a try/catch block */
                try
                {
                    v8.Evaluate(input); /* run the code */
                } catch (Exception e)
                {
                    /* something went wrong, show us the exception */
                    Console.WriteLine(e.Message);
                }
            }
        }
    }
}